If you have no CC and also can go from sundown to sunup without losing more than 1ppm of cl overnight, then you can let the chlorine drift down and keep it between 3-6 all the time. If you drop below 3, you risk an algae bloom. However, if both conditions in my first sentence are not true, then you need to keep the cl high for another day.

Of course, it is your pool but, I would advise going ahead and working on lowering the alk. It is a gradual process, won't get there overnight. You can just work on it a little at a time in the coming weeks.